goldfish grow to be a foot or so. And you can keep two in a 30 gallon. So why cant you keep other fish like a pair cichlids, like texas cichlids in a 30? They get to be the same size. And if just them in there. Is it because of agression? Or size? Or both? Or other like oscars? They gfet to a foot. Just like the goldfish.
And one more. In aquarium fish magazine I read someone kept their oscar with 3 goldfish. Wouldnt the oscar eat them, or kill them? Even if they are bigger or the same size as him?
And one more. In aquarium fish magazine I read someone kept their oscar with 3 goldfish. Wouldnt the oscar eat them, or kill them? Even if they are bigger or the same size as him?